Granted Patent
Utility
US 4,548,012 · App. 06/570,422
Collapsible framework
Inventor:
David Dyer
Patented Case
View Patent ↗
Granted: Oct 22, 1985
Filed: Jan 13, 1984
Inventor
David Dyer
Assignee (at issue)
Paul Weston
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.